Mark Kaercher
@shskaercher
Teacher/Learner/Maker of Math since 1994. Milken Educator & NYS Master Teacher Emeritus. he/him/his
ID: 273105296
https://sites.google.com/nccsk12.org/mrkaercher 27-03-2011 20:59:25
20,20K Tweet
4,4K Followers
1,1K Following